@ElaineMBenes thank you for your reply and contributions to this thread, which are quite the insight!! It does sound seriously intense and like it has some major gaps that need filling.
@EtiennePalmiere thanks also for the ballet element. Also the difference in shoes and so on. Loads to think about!
This is why I like FWR. You get a topic which does belong here but you don't know much about it, but then you get to learn so much around the topic, with links and so on to go off looking at.